Journal of Welding and Joining

The Korean Welding and Joining Society (대한용접접합학회)
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Nondestructive Evaluation of Ceramic/Metal Interface Using the V(z) Curve of Scanning Acoustic Microscope

초음파현미경에서 V(z) 곡선을 이용한 세라믹/금속 접합계면의 비파괴평가

  • Park Ik-Keun (NDE Technology Center, Seoul National University of Technology) ;
  • Lee Chul-Ku (NDE Technology Center, Seoul National University of Technology) ;
  • Cho Dong-Su (Graduate School of Industry, Seoul National University of Technology) ;
  • Kim Yong-Kwon (Graduate School of Energy and Environment, Seoul National University of Technology)
  • 박익근 (서울산업대학교 NDE기술센터) ;
  • 이철구 (서울산업대학교 NDE기술센터) ;
  • 조동수 (서울산업대학교 산업대학원) ;
  • 김용권 (서울산업대학교 에너지환경대학원)
  • Published : 2005.04.01
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Abstract

A leaky surface acoustic wave (LSAW) velocity was measured using a scanning acoustic microscope on the ceramic/metal interface in order to investigate material properties. The inverse Fourier transform (IFFT) of the V(z) curve contains the reflectance function of a liquid-specimen interface. So, the longitudinal, transverse, and Rayleigh wave velocities for each layer are obtained by the inversion of the V(z) curve at the same time. This paper contains mainly the experimental procedure for measurements of the LSAW velocity, and the results obtained for the velocity variation of individual layer after the thermal shock. It is shown that this method is useful in measuring the material properties under external stress.

Keywords

References

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